1. Institute of Pharmacy
2. Department of Pharmaceutical and Medicinal Chemistry
3. Friedrich-Schiller-Universität Jena
4. D-07743 Jena
5. Germany
6. Department of Pharmaceutical Chemistry
7. Faculty of Pharmacy and Biotechnology
8. German University in Cairo
9. Cairo 11835
10. Egypt
11. Institute of Organic Chemistry and Macromolecular Chemistry